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67221 Rev D

ST–47C GroundhogVehicle Static Earthing System

Groundhog EarthingVeri�cation System

DESCRIPTION

Don't let unsure earthing methods leave you guessing. Transport vehicles should be properly tied to earth before and during the loading operation.There should never be any doubt that the earthing systems at your terminalsare performing their proper function.Many systems give you little assurance of their operation. The ScullyGroundhog gives you completeassurance that a proper static earthtie-in is present. The Groundhogis a self-proving earthing system for maximum safety in loading operations.

The system consists of a rack mounted control housing with two connection methods. It can operate in conjunction with your existing Scully Over�llPrevention System or as anindependent unit. Scully SignalCompany has over 30 yearsof electronic liquid handling system experience. Scully is widely recognised for dependability, service and safety.

The Scully Groundhog earthing system can be used for a wide variety of loading applications for use with tank trucks, rail cars, and aircraft refuelers.

IMPORTANT

Static grounding is used to dissipate any electrical charges which can build upas a result of product �ow or other movement. Some applications such as raillines and pipelines may also have stray currents present. In these situations therail or pipeline must be bonded to ground independently from the Scully system.Local codes should be consulted regarding wire gauges and number of conductors.

FEATURES AND BENEFITS

Self-Proving, the Groundhogcontinuously monitors thegrounding connection throughoutthe loading operation.

Can be used in conjunction withyour Scully Over�ll PreventionSystem, offering one quickconnection for over�ll protection and earthing veri�cation.

Can also be used as a completely independent earthing system with a special quick-release plugfor grounding to a specially designed, vehicle mounted, electronic ball.

Direct earthing tie-in point at gantry available.

Immediately shuts down the loading operation if proper static earthingis not present.

ATEX, FM, CSA approved models available.

No manual checks are needed.

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ORDERING INFORMATIONModel Description Part Number

ST–47C Groundhog

Scully Ground Bolt

One Connection for Over�llPrevention and Earthing

THE SCULLY GROUNDHOG PROVES IT

The Scully Groundhog gives you complete assurance that earthing to the vehicle's frame has been accomplished. The Groundhog is an intelligent system which continuously and automatically monitors the earthing connection during the entire loading operation.

The Groundhog is designed toimmediately shut down the loading operation if the earth tie in is broken. That’s proof-positive, something noother system can provide.

The Groundhog control monitoris mounted at the loading rack.Indicator lights on the face of thecontrol monitor are visual proof that proper earthing has been accomplished.

The Groundhog requires that each vehicle be equipped with a specially designed Scully electronic Ground Ballor Bolt. Before the loading operationcan begin, the controller must see anintelligent return signal from the ground ball or bolt, indicating that a proper earthing connection has been made.

ARE YOUR EARTHING SYSTEM OPTIONS LIMITED?

The Groundhog Control Unit can be wired into your existing Scully Over�ll Prevention System for the ultimate safety system. Just one connection gives you over�ll and earthing protection.This single connection simpli�es loading and eliminates the need for additional plugs and cables at the gantry.

The Groundhog utilizes a separate conductor in the existing Scully Over�ll Prevention Plug and Cable together with

a special Scully Ground Bolt mountedon each vehicle. The Scully Ground Bolt’s sensing lead is wired to theScully Over�ll Prevention Socket. Only Scully offers you a complete, integrated over�ll prevention andvehicle earthing system for maximum safety in your loading operations.

CONTROL UNITS AND PLUG AND CABLE ASSEMBLY

If you intend to wire the Groundhog in conjunction with your existing Scully Over�ll Prevention System, you need only order the control monitor. For the independent system, order the control monitor and junction box with plug and cable.

ST-47C-240 EL Control monitor with lamps (240 VAC) 08710ST-47C-240 ELK Control monitor with lamps and key protected bypass switch (240 VAC) 08711ST-47C-120 EL Control monitor with lamps (120 VAC) 08844ST-47C-120 ELK Control monitor with lamps and key protected bypass switch (120 VAC) 08845SC-47 Gantry mounted heavy duty junction box with 6m (20') straight cable and ground proving plug for connection to vehicle mounted ground proving ball (Independent System) 08249SC-47CC Gantry mounted heavy duty junction box with 10m (30') coiled cable and ground proving plug for connection to vehicle mounted ground proving ball (Independent System) 08567

Vehicle Static Earthing SystemINTERNATIONAL

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LINE

REPLACEMENT PARTSModel Description Part Number

DON’T USE A SYSTEM THAT IS EASILY CHEATED

There are many systems that claimto be foolproof and even self-checking.It is possible with many of these systems to bypass a safe earth tiein by attaching the clamp to the rack,a metal shim or by jumping the plug contacts with a paper clip. In many cases, there is no proof that proper earthing has been made or that the system is functioning correctly.

The Scully Groundhog when used together with a Scully Ground Ballor Ground Bolt, foils these typical cheating methods and malfunctions that can lead to earthing vehicles improperly.

The Scully Earthing System insures that unless the proper earthing connection has been made, the loading processwill not begin. It will automatically shut down the loading operation if the ground is broken. The Groundhog’s intelligent monitoring capabilities and the special electronic circuitry insidethe Scully Ground Ball and Ground Bolt form a self-proving system. No manual checks are needed.

Only the Scully Groundhog can provide you with the safest and mostdependable means for vehicle static earthing. It maintains the integrityof your loading operation.

SCULLY HAS A SYSTEM FOR EVERY APPLICATION

The Groundhog can be used asa completely independent system.This system is ideal for top loadingor applications where a Scully Over�ll Prevention System is not in use.

The control monitor connects toa heavy duty Sculcon® junctionbox with attached cable and specialquick release snap-on plug.

The Scully Ground Plug connects toa specially designed electronic Scully Ground Ball mounted on each vehicle. The controller in conjunction with the ground ball provides and veri�es vehicle earthing before loading can begin.The controller must receive an electronic return signal from the ball throughout the loading operation.

Ground Ball Truck mounted electronic ground proving ball for independent Grounding System 08274Ground Bolt Truck mounted electronic ground proving bolt for wiring to over�ll prevention socket 08560Coiled Cable Replacement plug and 32' coiled cable assembly for SC-47 08566Straight Cable Replacement plug and 20' straight cable assembly for SC-47 08219Plug Replacement plug only for SC-47 08565Module 115 Replacement module for 115 VAC models 22040Module 240 Replacement module for 240 VAC models 22407Deadman Control Deadman switch with coiled cable 08863

Scully Groundhog Control Monitor with Plug and Cable

Operation Temperature: -40° to + 60° C (-40° to +140° F)Enclosure: Explosion-Proof/ Weather-Proof IP65 suf�x “E”Indicators: Red- not earthed/non-permit. Green- earthed/permit. Response Time: 0.5 seconds maximum.Electrical Connections: Internal terminal strips, identi�ed for easy installation.Bypass Switch: Key lockable off-on bypass switch for ELK model only.Output Control: One normally open user contact rated 250, 5A

Power Requirements: ST-47C-240 Models: 208-240 VAC, 50/60 Hz. 0.125 Amperes maximum. ST-47C-120 Models: 105-125 VAC, 50/60 Hz. 0.250 Amperes maximum.Shipping Weights: ST-47C-ELK; 12 kgs(26 lbs) ST-47C-EL; 12 kgs (26 lbs) SC-47; 4 kgs (9 lbs) Approvals: ATEX: Ex d [ia] IIB T5 Gb Consult factory for FM, CSA approved models.

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Copyright © 2013 Scully Signal Company. Dynacheck, Dynamic Self-Checking, Dynamic Self-Testing, Faylsafe, IntelliCheck, Intellitrol are registered trademarksof Scully Signal Company. All Rights Reserved. Speci�cations are subject to change without notice.

67221 Rev DJanuary 2015

TECHNICAL SPECIFICATIONS

ST–47C GroundhogVehicle Static Earthing System

31.8(1.25) M20 x 1.5

171.5(6.75)

Top View

Bottom View

50.8(2.0)

C

L

CL

50.8(2.0)

M20 x 1.5

43.2(1.7)

43.2(1.7)

214.3(8.37)

347.7(13.62)

scully

171.5(6.75)

146(5.75)

12.7(.50)

Mtg.LugCtr.

169.3(6.62)

42.6(1.68)

Side View

Front View

Back View

27 mm (1.06" Hole forConduit Hub (Cable Gland)

100.0 mm(3.94")

65.5 mm(2.58")

Mounting Centers for#8 (4 mm) Hex SocketHead Screws (4 Places)

200.0 mm(7.87")

186.2 mm(7.33")

31.3 mm(3.20")

36.6 mm(1.44")

100.0 mm(3.94")

27 mm (1.06") Knockout forConduit Hub (Cable Gland)

II 2(1)G

All Dimensions in Millimeters(Inches in Parenthesis)

Model ST-47C ELK Shown in Illustration Model SC-47 Shown in Illustration**Dimensions of units manufactured prior to 3/1/97 may vary.

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Scully Signal Company70 Industrial Way,Wilmington, MA 01887-3479, USA Tel: 800 272 8559 / 617 692 8600 email: sales@scully.com

Scully Systems Europe NVEksterveldlaan 31a2820 Bonheiden / Belgium Tel: +32 (0) 15 56 00 70 email: info@scully.be

Scully UK LtdMeridian House, Unit 33,37 Road One Winsford Industrial Estate,Winsford Cheshire CW7 3QG / UK Tel: +44 (0) 1606 553805 email: sales@scullyuk.com

SIL 2 Capable